JavaScript Code Blocks Mockest | JavaScript

1.

What is the purpose of code blocks in JavaScript?

A). A) To group statements together B). B) To define variables C). C) To declare functions D). D) To handle exceptions

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2.

How are code blocks defined in JavaScript?

A). A) Using parentheses () B). B) Using curly braces {} C). C) Using square brackets [] D). D) Using angle brackets <>

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3.

What is block scope in JavaScript?

A). A) Variables declared inside a block are globally scoped B). B) Variables declared inside a block have block scope C). C) Variables declared inside a block have function scope D). D) Variables declared inside a block have local scope

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4.

How do code blocks affect variable scope in JavaScript?

A). A) They make variables globally scoped B). B) They create block scope for variables C). C) They limit variable accessibility within functions D). D) They have no impact on variable scope

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5.

Which of the following is true about code blocks in JavaScript?

A). A) They can only contain function declarations B). B) They can contain variable declarations, statements, and functions C). C) They are used to define object literals D). D) They are used for loop iterations

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6.

What happens to variables declared inside a code block after the block executes?

A). A) They become globally scoped B). B) They are accessible only within the block C). C) They are accessible within the function containing the block D). D) They are accessible outside the block but with limited scope

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7.

What is the purpose of using code blocks in JavaScript?

A). A) To define global variables B). B) To limit variable scope and prevent naming conflicts C). C) To create asynchronous functions D). D) To handle errors and exceptions

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8.

How do code blocks contribute to code organization in JavaScript?

A). A) They make code less organized B). B) They allow for grouping and structuring code C). C) They introduce naming conflicts D). D) They limit the use of comments

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9.

What is block scope in JavaScript?

A). A) Variables declared inside a block are globally scoped B). B) Variables declared inside a block have block scope C). C) Variables declared inside a block have function scope D). D) Variables declared inside a block have local scope

Answer & Solution Discuss in Board

10.

How are code blocks defined in JavaScript?

A). A) Using parentheses () B). B) Using curly braces {} C). C) Using square brackets [] D). D) Using angle brackets <>

Answer & Solution Discuss in Board

JavaScript Code Blocks Mocktest

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